PhoneFactor provides “out of band” authentication via voice, text or an app for access to a range of corporate applications or banking services. On Thursday it became Microsoft’s two-factor solution.

Terms of the deal were not disclosed.

Microsoft highlights that Active Directory can be used to manage PhoneFactor authentication for access to SharePoint and cloud-based services, such as Azure.

“PhoneFactor is popular because its solutions interoperate well with Active Directory so users don’t have to learn new passwords and IT administrators and application developers can use infrastructure and services they already know. Also, perhaps most importantly, PhoneFactor is popular because it conveniently relies on a device that most users already have with them – their phone,” Microsoft wrote on its Azure Blog.

“As we bring PhoneFactor onboard, we will drive further integration with key Microsoft technologies like Active Directory, Windows Azure Active Directory and Office 365, making it even easier for customers to protect their on-premises and cloud assets.”

PhoneFactor has promised to continue working on interoperability with other systems but has not provided details on its plans yet.

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